diff --git a/hacking-maintenance-with-care/index.html b/hacking-maintenance-with-care/index.html
index 9c65e67..92f9ca2 100644
--- a/hacking-maintenance-with-care/index.html
+++ b/hacking-maintenance-with-care/index.html
@@ -48,8 +48,8 @@
 </ul>
 <img src="img/1.jpg" class='workimg'/>
 <img src="img/2.jpg" class='workimg'/>
-<img src="img/3.png" class='workimg'/>
-<img src="img/4.png" class='workimg'/>
+<img src="img/3.jpg" class='workimg'/>
+<img src="img/4.jpg" class='workimg'/>
 <img src="img/5.jpg" class='workimg'/>
 </div>
 <div id='publication'>